...However, in the case of high-energy gamma rays, the opening angle of the paired electrons produced by electron pair production is narrow, and the direction of their arrival can be determined by measuring their direction of travel using a spark chamber or a nuclear emulsion plate. By combining these techniques according to the purpose of observation and the level of precision, so-called gamma ray telescopes have been built to measure the energy and direction of gamma rays. As of the end of 1997, the location and mechanism of gamma ray bursts remain a mystery. ... *Some of the terminology that refers to "gamma ray telescope" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…しかしながら,エネルギーの高いγ線の場合,電子対生成でできる対電子の開角が狭く,その進行方向をスパークチェンバーや原子核乾板などによって測定して到来方向を決めることができる。 このような手法を,観測目的や精度に応じて組み合わせて,γ線のエネルギーや到来方向を測定するいわゆるγ線望遠鏡がつくられている。 1997年末現在,γ線バーストの発生場所,発生機構は依然として謎につつまれている。… ※「γ線望遠鏡」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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This small sutra, consisting of over 420 character...
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The erosion of a river or glacier toward its base...
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